20544334144 has 28 divisors (see below), whose sum is σ = 40778749024. Its totient is φ = 10269373824.

The previous prime is 20544334141. The next prime is 20544334207. The reversal of 20544334144 is 44143344502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544334141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204487 + ... + 287929.

Almost surely, 2^20544334144 is an apocalyptic number.

It is an amenable number.

20544334144 is a deficient number, since it is larger than the sum of its proper divisors (20234414880).

20544334144 is an equidigital number, since it uses as much as digits as its factorization.

20544334144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87302 (or 87292 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 34.

Adding to 20544334144 its reverse (44143344502), we get a palindrome (64687678646).

The spelling of 20544334144 in words is "twenty billion, five hundred forty-four million, three hundred thirty-four thousand, one hundred forty-four".